Across
- 3. Another name for a salt solution (5)
- 4. A low density, strong metal used for aircraft (8)
- 6. The element with chemical symbol H (8)
- 9. Calcium _________ is formed by heating limestone (5)
- 10. The loss of electrons (9)
- 12. Fertilisers supply plants with __________ elements (9)
- 14. A metal which rusts (4)
- 15. The gain of electrons (9)
- 18. The layer below the crust (6)
- 19. Calcium _________ contains OH- ions (9)
- 21. The element with chemical symbol N (8)
- 22. When magma cool slowly underground (9)
- 23. A substance with pH less than 7 (4)
Down
- 1. Added to iron to make steel (6)
- 2. The outer layer of the Earth (5)
- 4. This technique used a burette (9)
- 5. An ion which contains nitrogen (7)
- 7. The chemical name for salt is sodium __________ (8)
- 8. Made by mixing cement with sand, water and aggregate (8)
- 11. Small bits of limestone used in railways (9)
- 12. When lava cools quickly on the surface (9)
- 13. An ion contain phosphorous (9)
- 16. The chemical name for limestone is calcium ____________ (9)
- 17. Rusting is an example of this (9)
- 20. The compound with formula NH3 (7)